Ma Jizhen, Wang Yueqing, Pan Wei, Zhang Jintao
Key Laboratory for Colloid and Interface Chemistry of State Education Ministry School of Chemistry and Chemical Engineering, Shandong University, Jinan, 250100, P. R. China.
Shenzhen Research Institute of Shandong University, Virtural University Park, Nanshan, Shenzhen, 518057, Guangdong, P. R. China.
Chem Asian J. 2020 May 4;15(9):1500-1504. doi: 10.1002/asia.202000229. Epub 2020 Apr 7.
To rationally design efficient and cost-effective electrocatalysts, a simple but efficient strategy has been developed to directly anchor prussian blue analogue (PBA) nanocubes on cobalt hydroxide nanoplates (PBA@Co(OH) ) via the in-situ interfacial precipitation process. Subsequently, the thermal treatment in the presence of sodium hydrogen phosphite enabled the successful transition into metal phosphides with the hierarchical cube-on-plate structure. When used as electrocatalytsts, the obtained bimetal phosphides exhibited good bifunctional electrocatalytic activities for hydrogen and oxygen evolution reactions with good long-term stability. Thus, an enhanced performance for overall water splitting can be achieved, which could be ascribed to the hierarchical structure and favorable composition of as-prepared bimetal phosphide for rapid electron and mass transfer. The present study demonstrates a favorable approach to modulate the composition and structure of metal phosphide for enhancing the electrocatalytic ability toward water splitting.
为了合理设计高效且经济高效的电催化剂，已开发出一种简单而有效的策略，通过原位界面沉淀过程将普鲁士蓝类似物（PBA）纳米立方体直接锚定在氢氧化钴纳米片（PBA@Co(OH) ）上。随后，在亚磷酸氢钠存在下进行热处理，成功将其转变为具有分级板上立方体结构的金属磷化物。当用作电催化剂时，所获得的双金属磷化物对析氢和析氧反应表现出良好的双功能电催化活性，并具有良好的长期稳定性。因此，可以实现整体水分解性能的增强，这可归因于所制备的双金属磷化物的分级结构和有利组成，有利于快速的电子和质量传递。本研究展示了一种调节金属磷化物组成和结构以增强其对水分解电催化能力的有利方法。
